Slide 1 of 8, A series of four images. Each image shows a prism. The first image is a triangular prism and has an equilateral triangle for its cross section. The length of the prism has been ...

Ross, W. W. Description This is one of a series of models illustrating the volume of solids designed by William Wallace Ross, a school superintendent and mathematics teacher in Fremont, Ohio. The ...

The height of the prism has been marked with an arrow and labelled, length or height. Written above, the formula: volume equals area of cross section multiplied by length.